1980438 has 32 divisors (see below), whose sum is σ = 4202496. Its totient is φ = 620928.

The previous prime is 1980431. The next prime is 1980443. The reversal of 1980438 is 8340891.

It is a junction number, because it is equal to n+sod(n) for n = 1980399 and 1980408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15531 + ... + 15657.

It is an arithmetic number, because the mean of its divisors is an integer number (131328).

2^1980438 is an apocalyptic number.

1980438 is an abundant number, since it is smaller than the sum of its proper divisors (2222058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1980438 is a wasteful number, since it uses less digits than its factorization.

1980438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1980438 is about 1407.2803558637. The cubic root of 1980438 is about 125.5799821371.

The spelling of 1980438 in words is "one million, nine hundred eighty thousand, four hundred thirty-eight".